The first horizontal line and the first vertical line add up to the second line and the third line. For example, 2+1= 3,3+1= 4,2+triangle = 5,3+triangle = circle.

△=3 〓=5 ☆= 10 □=9 ◇=7 ○=6

+ 1 3 7 5

2 3 5 9 7

3 4 6 10 8

It is observed that there is a plus sign in the upper left corner, which is similar to a table. Where the number is equal to the top number plus the leftmost number. For example, if we know that 3 in the second row is equal to 1+2 and 4 in the third row is equal to 1+3, then we can get 5=△+2, so △=3. Then ○=△+3, so ○=6. Other symbols can be similarly derived.

Definition:

Equations are divided into equations with unknowns and equations without unknowns.

For example:

X+1= 3-an equation with unknowns;

2+1= 3-an equation without unknowns.

It should be noted that some equations with unknowns have no solutions, but they still have no solutions, such as x+1= x-x.